// MOCK DATA — TEMPORARY. See MockSwitch.dart.

import 'package:dio/dio.dart';

import '../about/external/data/RoutineChain.dart';
import '../about/external/data/pages/request/CommitmentsRequest.dart';
import '../about/external/data/pages/request/HistoryRequest.dart';
import '../about/external/initial/AbandonRequest.dart';
import '../about/external/initial/AmnestyRequest.dart';
import '../about/external/initial/CommitmentRequest.dart';
import '../about/external/initial/CompletionRequest.dart';
import '../about/external/initial/DeferralRequest.dart';
import '../about/external/initial/DeviceRequest.dart';
import '../about/external/initial/GoalRequest.dart';
import '../about/external/initial/GroupGoalRequest.dart';
import '../about/external/initial/GroupMessageRequest.dart';
import '../about/external/initial/GroupRequest.dart';
import '../about/external/initial/JoinGroupRequest.dart';
import '../about/external/initial/NudgeRequest.dart';
import '../about/external/initial/ObjectiveProgressRequest.dart';
import '../about/external/initial/IdRequest.dart';
import '../about/external/initial/LoginData.dart';
import '../about/external/initial/ReportCardRequest.dart';
import '../about/external/initial/SessionLogRequest.dart';
import '../about/external/initial/SickModeRequest.dart';
import '../about/external/initial/ToneRequest.dart';
import '../comms/ConnectComms.dart';
import 'MockGroups.dart';
import 'MockStore.dart';

/// A fake backend. Answers every call from [MockStore] after a short delay,
/// so loading states still flash the way they will against the real thing.
class MockComms implements ConnectComms {
  MockComms() {
    MockStore.ensureSeeded();
  }

  Future<Response> _ok(dynamic data) async {
    await Future<void>.delayed(const Duration(milliseconds: 250));
    return Response(
      requestOptions: RequestOptions(path: 'mock'),
      statusCode: 200,
      data: data,
    );
  }

  Future<Response> _done() => _ok(<String, dynamic>{'success': true});

  Future<Response> _emptyPage() => _ok(MockStore.page(<Map<String, dynamic>>[]));

  // ── Auth ──────────────────────────────────────────────────────────────────

  @override
  Future<Response> registerDevice(DeviceRequest request) => _done();

  @override
  Future<Response> registerDeviceToken(String token) => _done();

  @override
  Future<Response> login(LoginData request) => _ok(<String, dynamic>{
        'id': 'mock-user',
        'name': 'Alex',
        'token': 'mock-token',
        'pic': '',
        'tone': 'Firm',
        'standing': 'Good',
        'amnestyTokens': 3,
        'sickMode': false,
      });

  @override
  Future<Response> logout() => _done();

  @override
  Future<Response> me() => _ok(<String, dynamic>{'id': 'mock-user', 'name': 'Alex'});

  // ── Goals ─────────────────────────────────────────────────────────────────

  @override
  Future<Response> getMyGoals(HistoryRequest request) =>
      _ok(MockStore.goalsWithCounts());

  @override
  Future<Response> saveGoalEntry(GoalRequest request) {
    final Map<String, dynamic> json = request.toJson();
    json['targetDate'] = request.targetDate.isEmpty ? null : request.targetDate;
    json['archived'] = false;

    final int index =
        MockStore.goals.indexWhere((goal) => goal['id'] == request.id);
    if (request.id == null || index < 0) {
      json['id'] = MockStore.newId('goal');
      MockStore.goals.add(json);
    } else {
      MockStore.goals[index] = json;
    }
    return _ok(json);
  }

  @override
  Future<Response> getGoalTasks(IdRequest request) =>
      _ok(MockStore.goalTasks(request.id));

  @override
  Future<Response> archiveGoalEntry(IdRequest request) {
    for (Map<String, dynamic> goal in MockStore.goals) {
      if (goal['id'] == request.id) {
        goal['archived'] = true;
      }
    }
    return _done();
  }

  // ── Commitments ───────────────────────────────────────────────────────────

  @override
  Future<Response> getTodayPlan(CommitmentsRequest request) =>
      _ok(MockStore.page(MockStore.todayPlan()));

  @override
  Future<Response> getMyCommitments(CommitmentsRequest request) =>
      _ok(MockStore.page(MockStore.commitments));

  @override
  Future<Response> getOverdueQueue(HistoryRequest request) =>
      _ok(MockStore.page(MockStore.overdue()));

  @override
  Future<Response> saveCommitmentEntry(CommitmentRequest request) {
    final Map<String, dynamic> json = request.toJson();
    json['id'] = MockStore.newId('task');
    json['status'] = 'Open';
    json['deferralCount'] = 0;
    MockStore.commitments.add(json);
    return _ok(json);
  }

  @override
  Future<Response> updateCommitmentEntry(CommitmentRequest request) {
    final Map<String, dynamic>? item = MockStore.commitment(request.id ?? '');
    if (item != null) {
      item.addAll(request.toJson());
    }
    return _done();
  }

  @override
  Future<Response> deleteCommitmentEntry(IdRequest request) {
    MockStore.commitments.removeWhere((item) => item['id'] == request.id);
    return _done();
  }

  @override
  Future<Response> completeCommitmentEntry(CompletionRequest request) {
    final Map<String, dynamic>? item = MockStore.commitment(request.commitmentId);
    if (item != null) {
      final DateTime? end = DateTime.tryParse(item['dueEnd'] ?? '');
      item['status'] = end != null && end.isBefore(DateTime.now())
          ? 'LateCompleted'
          : 'Completed';
    }
    return _done();
  }

  @override
  Future<Response> deferCommitmentEntry(DeferralRequest request) {
    final Map<String, dynamic>? item = MockStore.commitment(request.commitmentId);
    if (item != null) {
      final DateTime now = DateTime.now();
      item['dueStart'] = request.newDueStart.isNotEmpty
          ? request.newDueStart
          : now.add(const Duration(hours: 1)).toIso8601String();
      item['dueEnd'] = request.newDueEnd.isNotEmpty
          ? request.newDueEnd
          : now.add(const Duration(days: 1)).toIso8601String();
      item['deferralCount'] = (item['deferralCount'] ?? 0) + 1;
      item['status'] = 'Deferred';
    }
    return _done();
  }

  @override
  Future<Response> abandonCommitmentEntry(AbandonRequest request) {
    final Map<String, dynamic>? item = MockStore.commitment(request.commitmentId);
    if (item != null) {
      item['status'] = 'Abandoned';
    }
    return _done();
  }

  @override
  Future<Response> getCommitmentHistory(HistoryRequest request) => _emptyPage();

  @override
  Future<Response> getCommitmentEvents(IdRequest request) => _emptyPage();

  // ── Capacity ──────────────────────────────────────────────────────────────

  @override
  Future<Response> checkCapacity(CommitmentsRequest request) => _done();

  @override
  Future<Response> getCapacityProfileEntry() => _ok(<String, dynamic>{});

  // ── Debt & standing ───────────────────────────────────────────────────────

  @override
  Future<Response> getDebtSummary() => _ok(<String, dynamic>{});

  @override
  Future<Response> getDebtLedger(HistoryRequest request) => _emptyPage();

  @override
  Future<Response> getDebtTrend(ReportCardRequest request) => _ok(<dynamic>[]);

  @override
  Future<Response> getStanding() => _ok(<String, dynamic>{'standing': 'Good'});

  @override
  Future<Response> getStandingHistory(HistoryRequest request) => _emptyPage();

  // ── Excuses ───────────────────────────────────────────────────────────────

  @override
  Future<Response> getExcuseClusters(ReportCardRequest request) =>
      _ok(<Map<String, dynamic>>[
        {
          'id': 'cluster-tired',
          'label': 'Too tired',
          'occurrences': 4,
          'dominantCategory': 'Deep work',
          'byWeekday': {'4': 3, '2': 1},
          'byHour': {'19': 3, '21': 1},
          'insight':
              "You've said \"too tired\" 4 times this month — 3 of them on Thursday evenings. Put deep work before lunch on Thursdays.",
        },
        {
          'id': 'cluster-time',
          'label': 'Ran out of time',
          'occurrences': 3,
          'dominantCategory': 'Admin',
          'byWeekday': {'1': 2, '5': 1},
          'byHour': {'17': 3},
          'insight': '',
        },
      ]);

  // ── Proof ─────────────────────────────────────────────────────────────────

  @override
  Future<Response> uploadPhotoProof(FormData request) =>
      _ok(<String, dynamic>{'proofRef': 'mock-photo'});

  @override
  Future<Response> submitTimerProofEntry(CompletionRequest request) =>
      completeCommitmentEntry(request);

  @override
  Future<Response> submitLocationProofEntry(CompletionRequest request) =>
      completeCommitmentEntry(request);

  // ── Guardrails ────────────────────────────────────────────────────────────

  @override
  Future<Response> spendAmnestyToken(AmnestyRequest request) => _done();

  @override
  Future<Response> getAmnestyBalance() => _ok(<String, dynamic>{'balance': 3});

  @override
  Future<Response> updateSickMode(SickModeRequest request) => _done();

  @override
  Future<Response> checkDistress() => _ok(<String, dynamic>{'distressed': false});

  @override
  Future<Response> updateTone(ToneRequest request) => _done();

  // ── Habits & routines ─────────────────────────────────────────────────────

  @override
  Future<Response> getMyHabits(HistoryRequest request) => _ok(<dynamic>[]);

  @override
  Future<Response> saveHabitEntry(Map<String, dynamic> request) => _done();

  @override
  Future<Response> logHabitEntry(IdRequest request) => _done();

  @override
  Future<Response> getKeystoneHabits() => _ok(<dynamic>[]);

  @override
  Future<Response> getMyRoutines(HistoryRequest request) => _ok(
      MockStore.routines.map((routine) => routine.toJson()).toList());

  @override
  Future<Response> saveRoutineEntry(Map<String, dynamic> request) {
    final RoutineChain routine = RoutineChain.fromJson(request);
    final int index = MockStore.routines
        .indexWhere((item) => item.id != null && item.id == routine.id);
    if (routine.id == null || index < 0) {
      routine.id = MockStore.newId('routine');
      MockStore.routines.add(routine);
    } else {
      // Keep today's progress across an edit.
      final RoutineChain before = MockStore.routines[index];
      for (int step = 0;
          step < routine.steps.length && step < before.steps.length;
          step++) {
        routine.steps[step].completed = before.steps[step].completed;
      }
      MockStore.routines[index] = routine;
    }
    return _ok(routine.toJson());
  }

  /// A logged run marks today's progress on the routine, so the library ring
  /// and the "done" tick reflect what just happened.
  @override
  Future<Response> logRoutineChainEntry(Map<String, dynamic> request) {
    for (RoutineChain routine in MockStore.routines) {
      if (routine.id == request['routineId']) {
        final int done = request['completedSteps'] ?? 0;
        for (int step = 0; step < routine.steps.length; step++) {
          routine.steps[step].completed = step < done;
        }
        routine.lastBreakIndex = request['breakIndex'] ?? -1;
      }
    }
    return _done();
  }

  // ── Training ──────────────────────────────────────────────────────────────

  @override
  Future<Response> getMyPrograms(HistoryRequest request) =>
      _ok(<Map<String, dynamic>>[
        {
          'id': 'program-base',
          'name': 'Base strength · 8 weeks',
          'weeks': 8,
          'sessionsPerWeek': 3,
          'deloadWeeks': <int>[4, 8],
          'weeklyContactCeiling': 120,
          'lowerBodyRecoveryHours': 48,
          'active': true,
        },
      ]);

  @override
  Future<Response> saveProgramEntry(Map<String, dynamic> request) => _done();

  @override
  Future<Response> activateProgramEntry(IdRequest request) => _done();

  @override
  Future<Response> getProgramSessions(IdRequest request) =>
      _ok(<Map<String, dynamic>>[
        {
          'id': 'session-a',
          'programId': 'program-base',
          'dayIndex': 0,
          'name': 'Day A · Squat & press',
          'highIntensityLowerBody': true,
          'prescriptions': <dynamic>[{}, {}, {}, {}],
        },
        {
          'id': 'session-b',
          'programId': 'program-base',
          'dayIndex': 2,
          'name': 'Day B · Pull & hinge',
          'highIntensityLowerBody': false,
          'prescriptions': <dynamic>[{}, {}, {}],
        },
      ]);

  @override
  Future<Response> startSessionEntry(IdRequest request) => _done();

  @override
  Future<Response> saveSessionLogEntry(SessionLogRequest request) => _done();

  @override
  Future<Response> getSessionHistory(HistoryRequest request) => _emptyPage();

  @override
  Future<Response> getLastSessionFor(IdRequest request) => _ok(<String, dynamic>{});

  @override
  Future<Response> getWeeklyVolume(ReportCardRequest request) => _ok(<String, dynamic>{});

  @override
  Future<Response> getContactVolume(ReportCardRequest request) => _ok(<String, dynamic>{});

  @override
  Future<Response> getPersonalRecords(HistoryRequest request) => _emptyPage();

  // ── Report card ───────────────────────────────────────────────────────────

  @override
  Future<Response> getWeeklyReportCard(ReportCardRequest request) => _ok(_report());

  @override
  Future<Response> getMonthlyReportCard(ReportCardRequest request) => _ok(_report());

  Map<String, dynamic> _report() {
    final DateTime now = DateTime.now();
    return {
      'id': 'report-week',
      'periodStart': now.subtract(const Duration(days: 7)).toIso8601String(),
      'periodEnd': now.toIso8601String(),
      'completionByClass': {
        'NonNegotiable': 0.92,
        'Standard': 0.71,
        'Elective': 0.40,
      },
      'completionByCategory': {
        'Deep work': 0.64,
        'Admin': 0.88,
        'Health': 0.79,
      },
      'completionByWeekday': {
        '1': 0.9, '2': 0.8, '3': 0.75, '4': 0.45, '5': 0.7, '6': 0.6, '7': 0.85,
      },
      'worstHour': 19,
      'debtTrend': <double>[8, 9.5, 11, 10.2, 7.4, 6.8, 5.9],
      'deferralLeaderboard': <Map<String, dynamic>>[
        {'commitmentId': 'c-email', 'title': 'Email supervisor the outline', 'count': 2},
        {'commitmentId': 'c-kitchen', 'title': 'Deep clean the kitchen', 'count': 1},
      ],
      'excuseTaxonomy': <dynamic>[],
      'estimationAccuracy': {'Deep work': 1.6, 'Admin': 1.1},
      'trainingAdherence': 0.83,
      'programIntegrity': 0.9,
      'assignedAction':
          'Move deep work before noon on Thursdays. That is where the week leaks.',
      'grade': 'B',
      'praise': 'Every non-negotiable but one landed inside its window.',
    };
  }

  // ── Notifications ─────────────────────────────────────────────────────────

  @override
  Future<Response> getMyNotifications(HistoryRequest request) => _emptyPage();

  @override
  Future<Response> acknowledgeNudgeEntry(IdRequest request) => _done();

  // ── Groups ────────────────────────────────────────────────────────────────

  @override
  Future<Response> getMyGroups(HistoryRequest request) => _ok(MockGroups.mine());

  @override
  Future<Response> getGroupEntry(IdRequest request) => _ok(MockGroups.one(request.id));

  @override
  Future<Response> saveGroupEntry(GroupRequest request) => _ok(MockGroups.save(request));

  @override
  Future<Response> joinGroupEntry(JoinGroupRequest request) => _ok(MockGroups.join(request));

  @override
  Future<Response> leaveGroupEntry(IdRequest request) => _ok(MockGroups.leave(request.id));

  @override
  Future<Response> saveGroupGoalEntry(GroupGoalRequest request) => _ok(MockGroups.saveGoal(request));

  @override
  Future<Response> logObjectiveProgress(ObjectiveProgressRequest request) => _ok(MockGroups.logProgress(request));

  @override
  Future<Response> getGroupMessages(IdRequest request) => _ok(MockGroups.messages(request.id));

  @override
  Future<Response> sendGroupMessage(GroupMessageRequest request) => _ok(MockGroups.send(request));

  @override
  Future<Response> nudgeGroupMember(NudgeRequest request) => _ok(MockGroups.nudge(request));
}